Evaluation of structural and mechanical properties of high strength aluminum alloy components fabricated using laser powder bed fusion process

2021 ◽  
Vol 33 (3) ◽  
pp. 032009
Author(s):  
Jyotirmoy Nandy ◽  
Seshadev Sahoo ◽  
Hrushikesh Sarangi ◽  
Rama Krushna Sabat
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Strength ◽  
Fusion Process ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
High Strength Aluminum Alloy

scholarly journals Influence of Powder Bed Temperature on the Microstructure and Mechanical Properties of Ti-6Al-4V Alloy Fabricated via Laser Powder Bed Fusion

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2278
Author(s):  
Lei-Lei Xing ◽  
Wen-Jing Zhang ◽  
Cong-Cong Zhao ◽  
Wen-Qiang Gao ◽  
Zhi-Jian Shen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Β Phase ◽  
Phase Precipitate ◽  
Bed Temperature ◽  
Martensitic Microstructure ◽  
Increasing Temperature

Laser powder bed fusion (LPBF) is being increasingly used in the fabrication of complex-shaped structure parts with high precision. It is easy to form martensitic microstructure in Ti-6Al-4V alloy during manufacturing. Pre-heating the powder bed can enhance the thermal field produced by cyclic laser heating during LPBF, which can tailor the microstructure and further improve the mechanical properties. In the present study, all the Ti-6Al-4V alloy samples manufactured by LPBF at different powder bed temperatures exhibit a near-full densification state, with the densification ratio of above 99.4%. When the powder bed temperature is lower than 400 °C, the specimens are composed of a single α′ martensite. As the temperature elevates to higher than 400 °C, the α and β phase precipitate at the α′ martensite boundaries by the diffusion and redistribution of V element. In addition, the α/α′ lath coarsening is presented with the increasing powder bed temperature. The specimens manufactured at the temperature lower than 400 °C exhibit high strength but bad ductility. Moreover, the ultimate tensile strength and yield strength reduce slightly, whereas the ductility is improved dramatically with the increasing temperature, when it is higher than 400 °C.

Co–Cr–Mo alloy fabricated by laser powder bed fusion process: grain structure, defect formation, and mechanical properties

2021 ◽  
Author(s):  
Alex Matos da Silva Costa ◽  
João Pedro Oliveira ◽  
André Luiz Jardini Munhoz ◽  
Eduardo Guimarães Barbosa Leite ◽  
Denise Souza de Freitas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Defect Formation ◽  
Fusion Process ◽  
Grain Structure ◽  
Structure Defect ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed
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